UCC28711D

The UCC28711D is a flyback Power Supply Controller provides isolated-output Constant-Voltage (CV) and constant-current (CC) output regulation without the use of an optical coupler. It process information from the primary power switch and an auxiliary flyback winding for precise control of output voltage and current. An internal 700V start-up switch, dynamically-controlled operating states and a tailored modulation profile support ultra-low standby power without sacrificing start-up time or output transient response. The output drive interfaces to a MOSFET power switch. Discontinuous conduction mode (DCM) with valley switching reduces switching losses. Modulation of switching frequency and primary current peak amplitude (FM and AM) keeps the conversion efficiency high across the entire load and line ranges.